'A bullet train for power': China's ultra-high-voltage electricity grid
China produces more clean energy than any other country. Now it's rolling out an ultra-high-voltage grid to match – will its ...
ABC15 Arizona19h
A look at the cost of cooling schools as millions of dollars are poured into HVAC replacements
Even though the weather is cooling down, school districts in the high country are continuing to put in new air conditioning units.